Sectional plastic step.



PATENTEVD N0v'.-24; '190s.

J. WALSH.

SEGTIONAL PLASTIC STEP.

APPLICATION PILEDAPR. 21, 1903.

' H0 MODEL.

v INVENTOR efazz yls WITNESSES.-

Aizarneya THE uonms PETERS 00., vnofamnov, WASHINGTON. m c,

tlrn Patented November 24, 1903.

JOHN WVALSH, OF WASHINGTON, DISTRICT OF COLUMBIA.

SECTIONAL PLASTIC STEP.

SPECIFICATION forming part of Letters Patent No. 744,887, dated November 24, 1903.

Application filed April 21, 1903.

To all whom it may concern.-

Be it known that I, JOHN WALSH, a citizen of the United States, residing at Vashington, in the District of Columbia, have invented new and useful Improvements in Sectional Plastic Steps, of which the following is a specification.

My invention relates to an improvement in sectional steps.

The object of my invention resides in a sectional step that may be readily assembled and the sections of which are so arranged and constructed as to be of a minimum weight, thereby facilitating the handling of the same.

Another feature is comprised in the formation of a stair composed of my sectional steps, wherein the setting of the sections is accomplished in such a manner as to completely conceal the joints of the said sections.

Finally, the object of myinvention is to provide a step of the character described that will'be strong, durable, efficient, and simple to construct and assemble and one that will be comparatively inexpensive to make and whose parts will not be liable to become displaced when the same have set.

WVith theabove and other objects in View the invention consists in the novel details of construction and arrangement, a preferable embodiment of which is described in the specification and illustrated in the drawings, wherein- Figure 1 is a perspective view with a portion of the tread of the lowermost step broken away to show the riser. Fig. 2 is a transverse vertical sectional View. Fig. 3 is a top plan view of one of the risers, showing the tread in dotted lines. Fig. 4 is a top plan view of a modified riser. Fig. 5 is a transverse Vertical sectional View of a modified step, and Fig. 6 is a partial front elevation broken away to show the base-wall.

In the drawings the numeral 1 designates the base-wall, which may be built of any suitable material and which may extend entirely across the steps, or, if preferred, two of these walls may be employedone at each side of the steps. The wall'l is formed with laterally-extending ledges 6 to support the risers hereinafter described. In cases where the Serial No. 153N520. (N0 modelsteps are located on the face of a terrace no base-walls will be necessary, as a suitable foundation may be cut therein.

My sectional step comprises a riser 2, having integral ends 3 and is preferably U -shaped in cross-section, although it may otherwise be formed. The riser supports a tread 4., which is preferably made in the form of a slab, as shown in the drawings.

It is to be understood that the parts of my sectional step may be composed of any plastic material and may be made to imitate different stones and materials or molded or formed in any suitable manner to suit the fancy of the builder. It is to be further observed that while I have illustrated a stair comprising a landing 5, which is formed by elongating the ends 3 of one of the risers and two steps, I may construct the stairs of any number of steps.

The base-wall l is made of a greater width than the thickness of the ends 3 of the risers 2, so as to provide a broad bearing-surface for the same, so that should it be desired to employ a back 7 the same may rest upon the inwardly-extending surfaces of the ledges 6 and also when necessary a bottom 8 may be supported upon the said ledges intermediate the riser 2 and the back 7, as illustrated in Figs. 5 and 6. In Fig. 5 I have shown a transverse sectional view of a step having a bottom 8 and a back 7 and in Fig 4 a top plan View of a riser formed with a back 7 is set forth. The back 7 may be made integral with the riser or it may be cast separate, as indicated in dotted lines.

In some instances where a very strong step is desirable the interior of the step, such as is shown in Fig. 5, maybe filled wit-l1 a suitable plastic material, and thusa solid step is produced.

In building a stair of my sectional. steps after the base-wall 1 or other suitable foundation has been constructed the risers 2 are cemented thereon, the lowest riser preferably IOO treads 4 are cemented to the risers.

The tread 4 is preferably formed to extend about a quarter of an inch, although the distance may be varied over the front and ends of the riser. Thus it will be seen that the step will have the appearance of a solid block, the joint between the tread and the riser being concealed by the overhanging edges of the tread.

Various changes may be made in the construction of the steps, which may be suitably ornamented, so I do not Wish to limit myself to the exact details herein set forth, as such alterations may be made without departing from the spirit of my invention.

Having thus fully described my invention,

" what I claim as new, and desire to secure by Letters Patent, i

1. In a sectional plastic step, a base-Wall, the hollow riser having the front 2 and the integral ends 3, the riser resting on the base- Wall, and an independent tread 4 supported upon the riser and overhanging the front 2 and the ends 3, said tread having its rear edge flush with the frontedge of the base-wall and the face of the next adjacent riser, substantially as described.

2. In a sectional plastic step, a hollow riser having integral ends, a tread supported upon the riser, and base-walls for supporting the riser, said Walls being of greater Width than the thickness of the ends of the said riser, substantially as described.

8. In a sectional plastic step, a hollow riser, a tread supported upon the riser, and a basewall for supporting the riser having inwardlyextending ledges, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses.

JOHN WALSH.

Witnesses:

NATHANIEL CARUsI, MILTON B. SCHLEY. 

